Curves have now been added to the window/black edges. Cinema4D *B Splines* (each with three points) were used to form the curves. I find *B splines* are ideal for replicating the curves that feature in these type of models.

I'm making those surfaces first and then forming a Cinema4D's hypernurbs to fit rather than cut the window/black areas out of an hypernurbs. The curved edges are particularly useful in helping the overall shape of the command module to be accurate.